Rob Southern
@mrsouthernmaths.bsky.social
Maths teacher - A level specialist. Co-author of "Teaching A Level Maths" with @susanwhitehouse.bsky.social published by the Mathematical Association.
I think it's "arc" for inverse trigonometric functions and "ar" for inverse hyperbolic functions, so arccotx in this case.
November 5, 2025 at 7:27 PM
I think it's "arc" for inverse trigonometric functions and "ar" for inverse hyperbolic functions, so arccotx in this case.
The big hill defeated me today 😕
November 1, 2025 at 7:11 PM
The big hill defeated me today 😕
You're not far from me! It's a beautiful day, enjoy.
November 1, 2025 at 11:32 AM
You're not far from me! It's a beautiful day, enjoy.
A hilly one this morning!
October 12, 2025 at 11:13 AM
A hilly one this morning!
How about "find the minimum value of r to 2dp"?
You could also have a maximum area where they have to round the value of r down, rather than using conventional rounding.
You could also have a maximum area where they have to round the value of r down, rather than using conventional rounding.
October 11, 2025 at 8:52 AM
How about "find the minimum value of r to 2dp"?
You could also have a maximum area where they have to round the value of r down, rather than using conventional rounding.
You could also have a maximum area where they have to round the value of r down, rather than using conventional rounding.
Add the numerators, add the denominators! 😃
September 28, 2025 at 10:50 AM
Add the numerators, add the denominators! 😃
Upping the miles in preparation for the Great South Run in 3 weeks time! 🏃♂️
September 28, 2025 at 10:29 AM
Upping the miles in preparation for the Great South Run in 3 weeks time! 🏃♂️
When I went on a tour of my daughter's primary school, something like this was on the wall. I stood there for ages trying to work out what "O" stood for.
(I'm used to Units!)
(I'm used to Units!)
September 14, 2025 at 3:02 PM
When I went on a tour of my daughter's primary school, something like this was on the wall. I stood there for ages trying to work out what "O" stood for.
(I'm used to Units!)
(I'm used to Units!)